Glass cutter



JOHN R. SCOI'IY, OF OKMULGEE, OKLAHOMA.

GLASS CUTTER.

Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filed December 11, 1920. Serial No. 429,843.

To all lwhom 'it may concern:

Be it known that I. Jorn: It. Scorri', a citizen of the United States, and a resident of kmulgee, in the county of Okrnulgee and State of Oklahoma, have made an Invention Appertaining to Glass Cutters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings and to the characters of reference marked thereon, which form a part of this specification.

My invention has for its object to provide a means for readily cutting glass. It particularly has for its object to provide a glass cylinder cutter which may be readily inanipulated to sever the glass cylinder into parts. In constructions containing my invention I provide a means for holding a glass cutter point such as a diamond or wheel in a definite position relative to the surface of the cylinder while the point is being drawn around the cylinder.

The invention may be contained in structures of different form's and to illustrate a practical application of the invention I have selected one of the structures containing the invention and shall describe it hereinafter. The structure selected is illustrated in the accompanying` drawings.

Figure 1 of the drawings is a top view of the glass cutter and Fig. 2 is a sectional view taken on the lineAQ--Q indicated in.

Fig. 1.

1 in the figures is a frame having the sides 2 separated and maintained in a parallel relation by means of the block 3 that ex- .tends between the upper edges of the sides- 2, and by the bolts 4 that extend through the sides 2 and the block 3. A bolt 2O may be also provided for securing the sides 2 in their position with reference to each other. The lower` edges 5 of the sides 2 are curved so as to conform substantially to the shape of the cylinder 6 to be out.

The block 3 is provided with a spring 7 that extends beyond the block 3 and is secured at one end to the block 3 by means of the screw 8. The position of the free end of the spring 7 is adjusted by means of the thumb bolt 9 which is threaded into the block 3,

A bar 10 extends between the sides 2 and is adgustably secured from rotation by means of the thumb nuts 11 located on studs that are formed integral with the bar 10. The studs 12 extend through the sides 2 and the sides are clamped by the thumb nuts 11. A sheath or quill 13 is secured in the central part of the bar 10. The sheath is provided with lngers leiA formed by slots extending lengthwise of the sheath or quill, and these are bent slightly inward so as to frictionallv engage the handle 15 on which is located the glass cuttlng wheel 16. The length of the handle 15 is such as to be engaged with the free end of the spring 7 and by reason of the adjustability of the spring 7 by means of the threaded bolt. 9 the handle 15 may be pressed towards the glass cylinder with any desired pressure. Also since the bar 10 is adJustable the angular position of the handle 15, and consequently the direction of pressure of the cutting wheels 16 against the glass cylinder, may be varied. The handle 15 may be provided with a collar 18 that may be adjustably secured by means of the pin 19 to the handle to limit the movement of the handle that may be induced by the spring 7 when the cutter is raised from the cylinder. If desired, a flexible strip 17 may be secured around the. glass cylinder as a guide for the glass cutter. One of the edges of the sides having substantially the Same curvature as the glass cylinder 6, may be placed against a flexible bar 17 and the frame 1 together with the glass cutting point may be drawn around the cylinder, keeping the side against the ieXible strip 17.

By this means the pressure exerted on the point 16 will be maintained constant and the direction of the pressure of the point 16 against tlieglass surface will also be maintained constant.

I claim:

l. In a glass cutter for severing glass cylinders a frame, the edges of the frame having a curvature substantially the saine as that of the glass cylinder to be cut, a glass cutter pivotally mounted on said frame and having cutting point, means for producing a substantially constant pressure of the glass cutting point, and means for maintaining a constant direction of pressure relative to the portion of the surface of the glass y cylinder against which the point is pressed.

2. In a'glass cutter for severing ,gl-lss cylgaging the end of the point, an adjustable inders a frame, the edges of the frame havbar for holding the sheath in a denite po- 10 ing a curvature substantially the same as siton relative to the surface ofthe glass that of the glass cylinder to be out, :L glass beneath the point. Y

5 cutting point, a handle Connected to the In testimony' whereof, I have hereunto point, a spring supported on the frame for signed my name to this specification. pressing against the end of the handle,` zt sheath for receiving and friotionally en- JOHN R. SCOHY. 

